target/arm: Delete dead code from disas_simd_indexed

MLA, MLS, SQDMULH, SQRDMULH, were converted with 8db93dcd3def
and f80701cb44d, and this code should have been removed then.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20240625183536.1672454-14-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
1 file changed