c-blosc: drop cmake patches and bump the c-blosc version

The PR (https://github.com/Blosc/c-blosc/pull/329) was merged into
c-blosc, so we can use newer version of it.

contrib/c-blosc/CMakeLists.txt

@@ -33,8 +33,7 @@ FetchContent_Declare(
   libblosc
 
   GIT_REPOSITORY https://github.com/Blosc/c-blosc.git
-  GIT_TAG a0e5c18d37db8e6f1003254a574c8062c5b45e00
-  PATCH_COMMAND patch < "${CMAKE_SOURCE_DIR}/patches/c-blosc.cmake.patch" && cd blosc && patch < "${CMAKE_SOURCE_DIR}/patches/c-blosc.blosc.cmake.patch"
+  GIT_TAG 5b68ad8a6c25e7f013e78b44e8b3bf3b5a6b9cc7
 )
 FetchContent_MakeAvailable(libblosc)
 

contrib/c-blosc/patches/c-blosc.blosc.cmake.patch

@@ -1,19 +0,0 @@
-# This is patch has a pending PR: https://github.com/Blosc/c-blosc/pull/329
-
---- CMakeLists.txt
-+++ CMakeLists.txt
-@@ -3,10 +3,9 @@ add_definitions(-DUSING_CMAKE)
- 
- set(INTERNAL_LIBS ${PROJECT_SOURCE_DIR}/internal-complibs)
- 
--# Hide symbols by default unless they're specifically exported.
--# This makes it easier to keep the set of exported symbols the
--# same across all compilers/platforms.
--set(CMAKE_C_VISIBILITY_PRESET hidden)
-+if(HIDE_SYMBOLS)
-+  set(CMAKE_C_VISIBILITY_PRESET hidden)
-+endif(HIDE_SYMBOLS)
- 
- # includes
- set(BLOSC_INCLUDE_DIRS ${BLOSC_INCLUDE_DIRS} ${CMAKE_CURRENT_SOURCE_DIR})
-

contrib/c-blosc/patches/c-blosc.cmake.patch

@@ -1,25 +0,0 @@
-# This is patch has a pending PR: https://github.com/Blosc/c-blosc/pull/329
-
---- CMakeLists.txt
-+++ CMakeLists.txt
-@@ -13,6 +13,8 @@
- #       build fuzz test programs and generates the "test" target
- #   BUILD_BENCHMARKS: default ON
- #       build the benchmark program
-+#   HIDE_SYMBOLS: default ON
-+#       hide the symols that aren't specifically exported
- #   DEACTIVATE_SSE2: default OFF
- #       do not attempt to build with SSE2 instructions
- #   DEACTIVATE_AVX2: default OFF
-@@ -98,6 +100,11 @@ option(BUILD_TESTS
-     "Build test programs from the blosc compression library" ON)
- option(BUILD_FUZZERS
-     "Build fuzzer programs from the blosc compression library" ${BUILD_STATIC})
-+# Hide symbols by default unless they're specifically exported.
-+# This makes it easier to keep the set of exported symbols the
-+# same across all compilers/platforms.
-+option(HIDE_SYMBOLS
-+    "Build a libraries with hidden symbols unless they're specifically exported" ON)
- option(BUILD_BENCHMARKS
-     "Build benchmark programs from the blosc compression library" ON)
- option(DEACTIVATE_SSE2