Revert "NSIS: depend on nsProcess instead of Processes NSIS plugin"

This reverts commit 8dd374fc2b.

https://github.com/owncloud/client/issues/3254

cmake/modules/NSIS.template.in

@@ -97,7 +97,6 @@ ReserveFile "${NSISDIR}\Plugins\InstallOptions.dll"
 !include WordFunc.nsh  ;Used by VersionCompare macro function.
 !include FileFunc.nsh  ;Used to read out parameters
 !include UAC.nsh ;Used by the UAC elevation to install as user or admin.
-!include nsProcess.nsh ;Used to kill the running process
 !include Library.nsh ;Used by the COM registration for shell extensions
 !include x64.nsh ;Used to determine the right arch for the shell extensions
 
@@ -258,7 +257,7 @@ FunctionEnd
 ##############################################################################
 
 !macro CheckForProcess processName gotoWhenFound gotoWhenNotFound
-   ${nsProcess::FindProcess} ${processName} $R0
+   Processes::FindProcess ${processName}
    StrCmp $R0 "0" ${gotoWhenNotFound} ${gotoWhenFound}
 !macroend
 
@@ -268,7 +267,7 @@ FunctionEnd
      /SD IDYES IDYES process_${processName}_kill IDNO process_${processName}_ended
    process_${processName}_kill:
       DetailPrint $ConfirmEndProcess_KILLING_PROCESSES_TEXT
-      ${nsProcess::KillProcess} ${processName} $R0
+      Processes::KillProcess ${processName}
       Sleep 1500
       StrCmp $R0 "1" process_${processName}_ended
       DetailPrint $ConfirmEndProcess_KILL_NOT_FOUND_TEXT