avfilter/x86/vf_interlace: remove redundant instructions

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavfilter/x86/vf_interlace.asm

@@ -42,8 +42,6 @@ cglobal lowpass_line, 5, 5, 7
     mova m1, [r3+r1+mmsize]
     pavgb m0, [r4+r1]
     pavgb m1, [r4+r1+mmsize]
-    mova m2, [r2+r1]
-    mova m3, [r2+r1+mmsize]
     pxor m0, m6
     pxor m1, m6
     pxor m2, m6, [r2+r1]