[improve] Remove redundant parentheses in pangu_moe.py (#2081)

### What this PR does / why we need it?

Remove redundant parentheses in pangu_moe.py.

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

Local.

- vLLM version: v0.10.0
- vLLM main:
099c046463

Signed-off-by: xleoken <xleoken@163.com>

setup.py

@@ -364,7 +364,7 @@ setup(
     version=VERSION,
     author="vLLM-Ascend team",
     license="Apache 2.0",
-    description=("vLLM Ascend backend plugin"),
+    description="vLLM Ascend backend plugin",
     long_description=read_readme(),
     long_description_content_type="text/markdown",
     url="https://github.com/vllm-project/vllm-ascend",