perf tools: Remove excess variable declarations

I thought array declaration might be done in the same line as assigning the value
to it.

Hence, getting rid of extra steps of reiterating the array name.

Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Link: https://lore.kernel.org/r/20250611100256.31089-1-unixbhaskar@gmail.com


Signed-off-by: Namhyung Kim <namhyung@kernel.org>