chore: remove code in the code base around discover hardcoded path

Source/OEXFindCoursesViewController.m

@@ -20,7 +20,6 @@
 
 static NSString* const OEXFindCoursesCourseInfoPath = @"course_info/";
 static NSString* const OEXFindCoursesPathIDKey = @"path_id";
-static NSString* const OEXFindCoursePathPrefix = @"course/";
 
 @interface OEXFindCoursesViewController () <WebViewNavigationDelegate, InterfaceOrientationOverriding>
 
@@ -100,10 +99,7 @@ - (DiscoveryConfig*)discoveryConfig {
 
 - (NSString*)getCoursePathIDFromURL:(NSURL*)url {
     if([url.scheme isEqualToString:OEXFindCoursesLinkURLScheme] && [url.oex_hostlessPath isEqualToString:OEXFindCoursesCourseInfoPath]) {
-        NSString* path = url.oex_queryParameters[OEXFindCoursesPathIDKey];
-        // the site sends us things of the form "course/<path_id>" we only want the path id
-        NSString* pathID = [path stringByReplacingOccurrencesOfString:OEXFindCoursePathPrefix withString:@"" options:0 range:NSMakeRange(0, OEXFindCoursePathPrefix.length)];
-        return pathID;
+        return url.oex_queryParameters[OEXFindCoursesPathIDKey];
     }
     return nil;
 }

Source/WebView/DiscoveryHelper.swift

@@ -12,7 +12,6 @@ import UIKit
 enum URIString: String {
     case appURLScheme = "edxapp"
     case pathPlaceHolder = "{path_id}"
-    case coursePathPrefix = "course/"
 }
 
 fileprivate enum URLParameterKeys: String, RawStringExtractable {
@@ -47,8 +46,7 @@ enum WebviewActions: String {
             return nil
         }
 
-        // the site sends us things of the form "course/<path_id>" we only want the path id
-        return path.replacingOccurrences(of: URIString.coursePathPrefix.rawValue, with: "")
+        return path
     }
 
     class func parse(url: URL) -> (courseId: String?, emailOptIn: Bool)? {

Test/DiscoveryHelperTests.swift

@@ -9,10 +9,10 @@
 import XCTest
 @testable import edX
 
-private let sampleInvalidProgramDetailURL = "//course_info?path_id=course/usmx-corporate-finance"
+private let sampleInvalidProgramDetailURL = "//course_info?path_id=usmx-corporate-finance"
 private let sampleEnrolledProgramDetailURL = "edxapp://enrolled_program_info?path_id=programs/a3951294-926b-4247-8c3c-51c1e4347a15/details_fragment"
 private let sampleEnrolledCourseDetailURL = "edxapp://enrolled_course_info?course_id=course-v1:USMx+BUMM612+2T2018"
-private let sampleProgramCourseURL = "edxapp://course_info?path_id=course/usmx-corporate-finance"
+private let sampleProgramCourseURL = "edxapp://course_info?path_id=usmx-corporate-finance"
 private let sampleCourseEnrollmentURL = "edxapp://enroll?course_id=course-v1:USMx+BUMM610+3T2018&email_opt_in=true"
 private let sampleProgramURL = "https://example.com/dashboard/programs_fragment/?mobile_only=true"
 private let sampleInvalidProgramURLTemplate = "https://example.com/dashboard/mobile_only=true"

Test/OEXFindCoursesTests.m

@@ -81,17 +81,17 @@ -(void)testFindCoursesURLRecognition{
     RouterEnvironment *environment = [self mockRouterEnvironment];
     DiscoveryWebViewHelper* helper = [[DiscoveryWebViewHelper alloc] initWithEnvironment:environment delegate:nil bottomBar:nil searchQuery:nil];
     OEXFindCoursesViewController *findCoursesViewController = [[OEXFindCoursesViewController alloc] init];
-    NSURLRequest *testURLRequestCorrect = [NSURLRequest requestWithURL:[NSURL URLWithString:@"edxapp://course_info?path_id=course/science-happiness-uc-berkeleyx-gg101x"]];
+    NSURLRequest *testURLRequestCorrect = [NSURLRequest requestWithURL:[NSURL URLWithString:@"edxapp://course_info?path_id=science-happiness-uc-berkeleyx-gg101x"]];
     BOOL successCorrect = ![findCoursesViewController webView:helper.t_webView shouldLoad:testURLRequestCorrect];
     XCTAssert(successCorrect, @"Correct URL not recognized");
 
-    NSURLRequest *testURLRequestWrong = [NSURLRequest requestWithURL:[NSURL URLWithString:@"edxapps://course_infos?path_id=course/science-happiness-uc-berkeleyx-gg101x"]];
+    NSURLRequest *testURLRequestWrong = [NSURLRequest requestWithURL:[NSURL URLWithString:@"edxapps://course_infos?path_id=science-happiness-uc-berkeleyx-gg101x"]];
     BOOL successWrong = [findCoursesViewController webView:helper.t_webView shouldLoad:testURLRequestWrong];
     XCTAssert(successWrong, @"Wrong URL not recognized");
 }
 
 -(void)testPathIDParsing{
-    NSURL *testURL = [NSURL URLWithString:@"edxapp://course_info?path_id=course/science-happiness-uc-berkeleyx-gg101x"];
+    NSURL *testURL = [NSURL URLWithString:@"edxapp://course_info?path_id=science-happiness-uc-berkeleyx-gg101x"];
     OEXFindCoursesViewController *findCoursesViewController = [[OEXFindCoursesViewController alloc] init];
 
     NSString *pathID = [findCoursesViewController getCoursePathIDFromURL:testURL];