intrinsic-test: remove now-unnecessary feat attr

crates/intrinsic-test/src/arm/config.rs

diff --git a/crates/intrinsic-test/src/arm/config.rs b/crates/intrinsic-test/src/arm/config.rs
index 87b8ebf..7c26143 100644
--- a/crates/intrinsic-test/src/arm/config.rs
+++ b/crates/intrinsic-test/src/arm/config.rs
@@ -9,7 +9,6 @@
 #![cfg_attr(target_arch = "arm", feature(stdarch_arm_neon_intrinsics))]
 #![cfg_attr(target_arch = "arm", feature(stdarch_aarch32_crc32))]
 #![cfg_attr(any(target_arch = "aarch64", target_arch = "arm64ec"), feature(stdarch_neon_fcma))]
-#![cfg_attr(any(target_arch = "aarch64", target_arch = "arm64ec"), feature(stdarch_neon_dotprod))]
 #![cfg_attr(any(target_arch = "aarch64", target_arch = "arm64ec"), feature(stdarch_neon_i8mm))]
 #![cfg_attr(any(target_arch = "aarch64", target_arch = "arm64ec"), feature(stdarch_neon_sm4))]
 #![cfg_attr(any(target_arch = "aarch64", target_arch = "arm64ec"), feature(stdarch_neon_ftts))]