Removing test file. (#1545)

This test file is just testing compilation with the library works correctly but is no longer needed because:
- it is not cross platform
- it taps into the CTest system which is better suited for real unit/integration tests
- it can be incorporated into the pipeline of github actions instead in the future

cmake/test-pkgconfig.sh

@@ -1,21 +0,0 @@
-#!/bin/sh
-# Test if including/linking/running an installed raylib works
-
-set -x
-export LD_RUN_PATH=/usr/local/lib
-
-CFLAGS="-Wall -Wextra -Werror $CFLAGS"
-if [ "$ARCH" = "i386" ]; then
-CFLAGS="-m32 $CLFAGS"
-fi
-
-cat << EOF | ${CC:-cc} -otest -xc - $(pkg-config --libs --cflags $@ raylib.pc) $CFLAGS && exec ./test
-#include <stdlib.h>
-#include <raylib.h>
-
-int main(void)
-{
-    int num = GetRandomValue(42, 1337);
-    return 42 <= num && num <= 1337 ? EXIT_SUCCESS : EXIT_FAILURE;
-}
-EOF