configure: Remove unneeded icl inline compatibility definition

Signed-off-by: Martin Storsjö <martin@martin.st>

configure

@@ -2625,7 +2625,7 @@ probe_cc(){
         # -Qdiag-error to make icl error when presented with certain unknown arguments
         _flags='-nologo -Qdiag-error:4044,10157'
         # -Qvec- -Qsimd- to prevent miscompilation, -GS for consistency with msvc which enables it by default
-        _cflags='-D_USE_MATH_DEFINES -Dinline=__inline -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS'
+        _cflags='-D_USE_MATH_DEFINES -FIstdlib.h -Dstrtoll=_strtoi64 -Qms0 -Qvec- -Qsimd- -GS'
         if [ $pfx = hostcc ]; then
             append _cflags -Dsnprintf=_snprintf
         fi