Revert "Make sdl2-config interpreter configurable"

This reverts commit b9f005505b.

Making the interpreter configurable is a band-aid fix.
So revert the workaround until we know the actual cause.

configure

@@ -727,7 +727,6 @@ ALSA_LIBS
 ALSA_CFLAGS
 ALLOCA
 CPP
-SDL2_CONFIG_INTERPRETER
 LIBTOOLLINKERTAG
 LINKER
 SORT
@@ -18338,18 +18337,6 @@ esac
 
 
 
-case "$host" in
-    # On Solaris, jack must be linked deferred explicitly
-    # to prevent undefined symbol failures.
-    *-*-solaris*)
-        SDL2_CONFIG_INTERPRETER=/bin/bash
-        ;;
-    *)
-        SDL2_CONFIG_INTERPRETER=/bin/sh
-        ;;
-esac
-
-
 if test x$srcdir != x.; then
     INCLUDE="-Iinclude $INCLUDE"
 elif test -d .git; then