Removed rules after they have been added to SonarPHP 2.14 core rules set

https://jira.sonarsource.com/jira/secure/ReleaseNote.jspa?projectId=10956&version=14346
S1 -  Functions used for system command execution are forbidden
-> [SONARPHP-806] - Rule S4721: Executing OS commands is security-sensitive
S7 - unserialize function should not be used on untrusted data
-> [SONARPHP-805] - Rule S4508: Deserializing objects from an untrusted source is security-sensitive

src/main/java/fr/niji/sonarphp/PHPRuleDefinitions.java

@@ -52,13 +52,11 @@ public String repositoryKey() {
   @Override
   public ImmutableList<Class> checkClasses() {
       return ImmutableList.of(
-              SystemExecFunctionUseCheck.class,
               CURLDisableTLSCheck.class,
               CURLTLSMisconfigurationCheck.class,
               NamespaceImportCheck.class,
               DrupalDatabaseStaticQueryCheck.class,
               DrupalDatabaseDynamicQueryCheck.class,
-              UnserializeFunctionUseCheck.class,
               InputSuperglobalVariableUseCheck.class,
               DrupalFormStateUserInputUsageCheck.class,
               FilterInputUnsafeRawUseCheck.class

src/main/java/fr/niji/sonarphp/checks/CURLDisableTLSCheck.java

@@ -10,15 +10,11 @@
 import org.sonar.plugins.php.api.tree.Tree;
 import org.sonar.plugins.php.api.tree.Tree.Kind;
 import org.sonar.plugins.php.api.tree.declaration.NamespaceNameTree;
-import org.sonar.plugins.php.api.tree.expression.ArrayInitializerFunctionTree;
 import org.sonar.plugins.php.api.tree.expression.ExpressionTree;
 import org.sonar.plugins.php.api.tree.expression.FunctionCallTree;
 import org.sonar.plugins.php.api.tree.expression.LiteralTree;
 import org.sonar.plugins.php.api.visitors.PHPVisitorCheck;
 
-import java.text.NumberFormat;
-import java.text.ParseException;
-import java.util.Set;
 
 @Rule(key = CURLDisableTLSCheck.KEY)
 public class CURLDisableTLSCheck extends PHPVisitorCheck {

src/test/java/fr/niji/sonarphp/PHPRuleDefinitionsTest.java

@@ -13,6 +13,6 @@ public void rules() {
     RulesDefinition.Context context = new RulesDefinition.Context();
     rulesDefinition.define(context);
     RulesDefinition.Repository repository = context.repository("niji-php-rules");
-    assertEquals(10, repository.rules().size());
+    assertEquals(8, repository.rules().size());
   }
 }