remove redundant compile.cmd script

It used to be necessary to have special DOS compilation commands when compiling earlier versions of pyodbc but that is no longer needed.  Besides, we build Windows wheels in Github Actions now.

appveyor.yml

@@ -35,11 +35,6 @@ environment:
     APVYR_RUN_MYSQL_TESTS: "true"
     APVYR_GENERATE_WHEELS: "false"
     APVYR_VERBOSE: "true"
-    # SDK v7.0 MSVC Express 2008's SetEnv.cmd script will fail if the
-    # /E:ON and /V:ON options are not enabled in the batch script interpreter
-    # http://stackoverflow.com/a/13751649/163740
-    # http://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros#microsoft-specific-predefined-macros
-    WITH_COMPILER: "cmd /E:ON /V:ON /C .\\appveyor\\compile.cmd"
     # database-related variables, which must match the "init:" and "services:" sections below
     # ref: https://www.appveyor.com/docs/services-databases/
     MSSQL_INSTANCE: "(local)\\SQL2019"

appveyor/after_test.cmd

@@ -3,7 +3,7 @@ IF "%APVYR_GENERATE_WHEELS%" == "true" (
   "%PYTHON_HOME%\python" -m pip install build wheel --quiet --no-warn-script-location
   ECHO.
   ECHO *** Generate the wheel file
-  %WITH_COMPILER% "%PYTHON_HOME%\python" -m build --wheel --no-isolation
+  "%PYTHON_HOME%\python" -m build --wheel --no-isolation
   ECHO.
   ECHO *** \dist directory listing:
   DIR /B dist