Revert "Link MinGW builds with static libgcc"

This reverts commit fc9ba5db9b.

This is better handled elsewhere:
https://github.com/chocolate-doom/chocpkg/issues/10

configure.ac

@@ -13,7 +13,6 @@ AC_CONFIG_AUX_DIR(autotools)
 AC_CANONICAL_HOST
 
 orig_CFLAGS="$CFLAGS"
-orig_LDFLAGS="$LDFLAGS"
 
 AC_PROG_CC
 AC_PROG_RANLIB
@@ -28,11 +27,6 @@ if test "$GCC" = "yes"
 then
         WARNINGS="-Wall -Wdeclaration-after-statement -Wredundant-decls"
         CFLAGS="-O$OPT_LEVEL -g $WARNINGS $orig_CFLAGS"
-        case "$host" in
-          *-*-mingw*)
-            LDFLAGS="-static-libgcc $orig_LDFLAGS"
-            ;;
-        esac
 fi
 
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