Remove COMPILE_CUSTOM_KERNELS env (#4864)

With more and more custom ops merged, disable `COMPILE_CUSTOM_KERNELS `
for vllm ascend seems useless now. Let's enable csrc compile by default.

- vLLM version: v0.12.0
- vLLM main:
ad32e3e19c

Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>

.github/Dockerfile.buildwheel

@@ -17,12 +17,10 @@
 ARG PY_VERSION=3.11
 FROM quay.io/ascend/manylinux:8.3.rc2-910b-manylinux_2_28-py${PY_VERSION}
 
-ARG COMPILE_CUSTOM_KERNELS=1
 ARG SOC_VERSION="ascend910b1"
 
 # Define environments
 ENV DEBIAN_FRONTEND=noninteractive
-ENV COMPILE_CUSTOM_KERNELS=${COMPILE_CUSTOM_KERNELS}
 ENV SOC_VERSION=$SOC_VERSION
 RUN yum update -y && \
     yum install -y python3-pip git vim wget net-tools gcc gcc-c++ make cmake numactl-devel && \

.github/Dockerfile.nightly.a2

@@ -23,7 +23,6 @@ ARG AIS_BENCH_URL="https://gitee.com/aisbench/benchmark.git"
 
 # Define environments
 ENV DEBIAN_FRONTEND=noninteractive
-ENV COMPILE_CUSTOM_KERNELS=${COMPILE_CUSTOM_KERNELS}
 
 WORKDIR /workspace
 

.github/Dockerfile.nightly.a3

@@ -23,7 +23,6 @@ ARG AIS_BENCH_URL="https://gitee.com/aisbench/benchmark.git"
 
 # Define environments
 ENV DEBIAN_FRONTEND=noninteractive
-ENV COMPILE_CUSTOM_KERNELS=${COMPILE_CUSTOM_KERNELS}
 
 WORKDIR /workspace