contrib: remove speexdsp NEON patch

No longer needed due to upstream change.

(cherry picked from commit 5a9d3161e037c1634d6b4621f1e1ce09639de90f)
Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

contrib/src/speexdsp/rules.mak

@@ -20,7 +20,6 @@ speexdsp: speexdsp-$(SPEEXDSP_VERSION).tar.gz .sum-speexdsp
 	rm -Rf $@-git $@
 	mkdir -p $@-git
 	$(ZCAT) "$<" | (cd $@-git && tar xv --strip-components=1)
-	$(APPLY) $(SRC)/speexdsp/neon.patch
 	$(MOVE)
 
 SPEEXDSP_CONF := --enable-resample-full-sinc-table