MAINT: Remove duplicate files from .gitignore

This commit removes lines 127-130 as they are duplicates of 149-152.
These lines correspond to the files:

    * numpy/core/src/common/npy_binsearch.h
    * numpy/core/src/common/npy_partition.h
    * numpy/core/src/common/npy_sort.h
    * numpy/core/src/common/templ_common.h

Author: Kai-Striega

Diff for: .gitignore

@@ -146,10 +146,6 @@ numpy/core/src/npysort/radixsort.c
 numpy/core/src/npysort/selection.c
 numpy/core/src/npysort/timsort.c
 numpy/core/src/npysort/sort.c
-numpy/core/src/common/npy_binsearch.h
-numpy/core/src/common/npy_partition.h
-numpy/core/src/common/npy_sort.h
-numpy/core/src/common/templ_common.h
 numpy/core/src/private/npy_binsearch.h
 numpy/core/src/private/npy_partition.h
 numpy/core/src/private/templ_common.h