Removed dubious tests and matching patterns

Author: Amichaxx

llvm/lib/Target/AArch64/AArch64InstrInfo.td

@@ -5332,11 +5332,6 @@ defm UCVTF : IntegerToFP<0b00, 0b011, "ucvtf", any_uint_to_fp>;
 let Predicates = [HasNEONandIsStreamingSafe, HasFPRCVT] in {
   defm SCVTF : IntegerToFPSIMDScalar<0b11, 0b100, "scvtf", any_sint_to_fp>;
   defm UCVTF : IntegerToFPSIMDScalar<0b11, 0b101, "ucvtf", any_uint_to_fp>;
-
-  def : Pat<(v1f64 (extract_subvector (v2f64 (sint_to_fp (v2i64 (sext (v2i32 V64:$Rn))))), (i64 0))),
-          (SCVTFDSr (EXTRACT_SUBREG V64:$Rn, ssub))>;
-  def : Pat<(v1f64 (extract_subvector (v2f64 (uint_to_fp (v2i64 (zext (v2i32 V64:$Rn))))), (i64 0))),
-          (UCVTFDSr (EXTRACT_SUBREG V64:$Rn, ssub))>;
 }
 
 def : Pat<(f16 (fdiv (f16 (any_sint_to_fp (i32 GPR32:$Rn))), fixedpoint_f16_i32:$scale)),