Remove no longer needed portable compile script

extra/build_portable_launcher.cmd

@@ -1,77 +0,0 @@
-@echo off
-
-setlocal enableextensions 2>nul:
-if not %errorlevel% == 0 goto extensions_failure
-goto tool_tests
-
-:extensions_failure
-echo Error: Your command interpreter (cmd.exe) does not support
-echo command processor extensions.  This is a requirement for
-echo this build script to work.  Please upgrade your command processor.
-echo.
-pause > NUL:
-goto :eof
-
-:tool_tests
-
-:test_nsis
-makensis.exe /version >NUL: 2>NUL:
-if %errorlevel% == 0 goto init
-
-:nsis_not_found
-echo Error: NSIS compiler 'makensis.exe' was not found in PATH.
-echo.
-echo After install NSIS, modify your system path to include the
-echo location of this file.
-echo.
-echo See also:
-echo http://nsis.sourceforge.net/
-echo.
-pause > NUL:
-goto :eof
-
-:init
-set start_time=%DATE% %TIME%
-set start_dir=%CD%
-cd portable_launcher
-set base_dir=%CD%
-
-set compiler=makensis.exe
-rem /v2 = no info, only warnings
-set params=/v2
-
-set clean_only=false
-
-:param_loop
-if %0. == . goto param_done
-if %0. == --clean. set clean_only=true
-shift
-goto param_loop
-
-:param_done
-echo Base directory:          %base_dir%
-echo Compiler directory:      %compiler_dir%
-
-:start
-rem Delete old binaries
-echo Cleaning build directories.
-cd /d "%base_dir%"
-del /S HeidiSQLPortable.exe
-if %clean_only% == true goto end
-goto build
-
-:build
-echo.
-
-rem Build main executable
-echo Compiling main project.
-"%compiler%" %params% HeidiSQLPortable.nsi
-if not %errorlevel% == 0 goto end
-
-echo.
-echo Started:   %start_time%
-echo Finished:  %DATE% %TIME%
-echo.
-
-:end
-cd /d "%start_dir%" 2>NUL: