Adding script to remove directories and files

scripts/installer.nsh

@@ -1,67 +1,6 @@
 !include 'LogicLib.nsh'
 
-!define UnStrStr "!insertmacro UnStrStr"
-
-!macro UnStrStr ResultVar String SubString
-  Push `${String}`
-  Push `${SubString}`
-  Call UnStrStr
-  Pop `${ResultVar}`
-!macroend
-
-Function UnStrStr
-/*After this point:
-  ------------------------------------------
-  $R0 = SubString (input)
-  $R1 = String (input)
-  $R2 = SubStringLen (temp)
-  $R3 = StrLen (temp)
-  $R4 = StartCharPos (temp)
-  $R5 = TempStr (temp)*/
-
-  ;Get input from user
-  Exch $R0
-  Exch
-  Exch $R1
-  Push $R2
-  Push $R3
-  Push $R4
-  Push $R5
-
-  ;Get "String" and "SubString" length
-  StrLen $R2 $R0
-  StrLen $R3 $R1
-  ;Start "StartCharPos" counter
-  StrCpy $R4 0
-
-  ;Loop until "SubString" is found or "String" reaches its end
-  ${Do}
-    ;Remove everything before and after the searched part ("TempStr")
-    StrCpy $R5 $R1 $R2 $R4
-
-    ;Compare "TempStr" with "SubString"
-    ${IfThen} $R5 == $R0 ${|} ${ExitDo} ${|}
-    ;If not "SubString", this could be "String"'s end
-    ${IfThen} $R4 >= $R3 ${|} ${ExitDo} ${|}
-    ;If not, continue the loop
-    IntOp $R4 $R4 + 1
-  ${Loop}
-
-/*After this point:
-  ------------------------------------------
-  $R0 = ResultVar (output)*/
-
-  ;Remove part before "SubString" on "String" (if there has one)
-  StrCpy $R0 $R1 `` $R4
-
-  ;Return output to user
-  Pop $R5
-  Pop $R4
-  Pop $R3
-  Pop $R2
-  Pop $R1
-  Exch $R0
-FunctionEnd
+${UnStrStr}
 
 Section uninstall
   ClearErrors