glibc: Remove partial BZ#25847 backport patches

To facilitate a clean backport of the full 10-commit series
addressing the pthread condition variable lost wakeup issue
(BZ#25847) in glibc 2.35, remove the existing 8 patches that
were applied as a partial backport.

The previous partial backport excluded commit:
c36fc50781995e6758cae2b6927839d0157f213c ("nptl: Remove
g_refs from condition variables") based on guidance from
glibc maintainer Florian Weimer(#comment #74)

This exclusion was recommended for stable branches to
avoid altering the layout of pthread_cond_t, which could
introduce ABI incompatibilities. Additionally, the dependent
commit dbc5a50d12eff4cb3f782129029d04b8a76f58e7 was not needed
in the partial backport.

To align with upstream mainline, per maintainer Carlos O'Donell
(comment #75), apply the complete 10-commit series for consistency.

By removing these patches first, we ensure the subsequent
application of the full 10 commits results in cleaner, more
reviewable changes without intermixed conflicts or overlaps.

Removed patches and corresponding upstream commits:
- 0026-PR25847-1.patch: 1db84775f831a1494993ce9c118deaf9537cc50a
- 0026-PR25847-2.patch: 0cc973160c23bb67f895bc887dd6942d29f8fee3
- 0026-PR25847-3.patch: b42cc6af11062c260c7dfa91f1c89891366fed3e
- 0026-PR25847-4.patch: 4f7b051f8ee3feff1b53b27a906f245afaa9cee1
- 0026-PR25847-5.patch: 929a4764ac90382616b6a21f099192b2475da674
- 0026-PR25847-6.patch: ee6c14ed59d480720721aaacc5fb03213dc153da
- 0026-PR25847-7.patch: 4b79e27a5073c02f6bff9aa8f4791230a0ab1867
- 0026-PR25847-8.patch: 91bb902f58264a2fd50fbce8f39a9a290dd23706

Bug reference: https://sourceware.org/bugzilla/show_bug.cgi?id=25847
This change prepares the branch for the full backport in follow-up commits.

Signed-off-by: Sunil Dora <[email protected]>
Signed-off-by: Steve Sakoman <[email protected]>

Author: windsunil