removed abseil-cpp submodule

.gitmodules

@@ -7,9 +7,6 @@
 [submodule "third_party/fmt"]
  path = third_party/fmt
  url = https://github.com/fmtlib/fmt
-[submodule "third_party/abseil-cpp"]
- path = third_party/abseil-cpp
- url = https://github.com/abseil/abseil-cpp.git
 [submodule "third_party/datetime"]
  path = third_party/datetime
  url = https://github.com/HowardHinnant/date.git

.licenserc.yaml

@@ -12,7 +12,6 @@ header:
  - '.clang-tidy'
  - '.cmake-format'
  - '.licenserc.yaml'
- - 'third_party/abseil-cpp'
  - 'third_party/antlr4'
  - 'third_party/datetime'
  - 'third_party/fmt'

CMakeLists.txt

@@ -33,25 +33,12 @@ option(
 include_directories(include)
 include_directories(src)
 
-# TODO: Simplify once we can require cmake 3.27 (where CONFIG is default).
-
-# Due to packaging changes we use the combined protobuf/absl packaging if
-# available otherwise we fallback to the older protobuf method.
 find_package(Protobuf QUIET CONFIG)
 if(${Protobuf_FOUND})
  message(STATUS "Modern protobuf library located.")
- set(ABSL_INCLUDED_WITH_PROTOBUF ON)
 else()
- find_package(Protobuf QUIET)
- if(${Protobuf_FOUND})
- message(STATUS "Legacy protobuf library located.")
- include_directories(${Protobuf_INCLUDE_DIRS})
- set(ABSL_INCLUDED_WITH_PROTOBUF OFF)
- else()
- message(STATUS "Fetching external protobuf library.")
- include(third_party/protobuf.cmake)
- set(ABSL_INCLUDED_WITH_PROTOBUF ON)
- endif()
+ message(STATUS "Fetching external protobuf library.")
+ include(third_party/protobuf.cmake)
 endif()
 
 add_subdirectory(third_party)

third_party/CMakeLists.txt

@@ -4,10 +4,6 @@
 set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
 
 set(ABSL_ENABLE_INSTALL ON)
-if(NOT ${ABSL_INCLUDED_WITH_PROTOBUF})
- set(ABSL_PROPAGATE_CXX_STD ON)
- add_subdirectory(abseil-cpp)
-endif()
 
 include(datetime.cmake)