Cleanup: remove unnecessary argument to else() in CMake

We have moved away from duplicating arguments in else() and endif()
commands.

build_files/build_environment/cmake/harvest.cmake

@@ -26,7 +26,7 @@ if(WIN32)
     )
   endif()
 
-else(WIN32)
+else()
 
   function(harvest from to)
     set(pattern "")

build_files/build_environment/cmake/jpeg.cmake

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 if(WIN32)
-  # cmake for windows
+  # CMAKE for MS-Windows.
   set(JPEG_EXTRA_ARGS
     -DNASM=${NASM_PATH}
     -DWITH_JPEG8=ON
@@ -33,8 +33,8 @@ if(WIN32)
     )
   endif()
 
-else(WIN32)
-  # cmake for unix
+else()
+  # CMAKE for UNIX.
   set(JPEG_EXTRA_ARGS
     -DWITH_JPEG8=ON
     -DENABLE_STATIC=ON

build_files/build_environment/cmake/options.cmake

@@ -15,7 +15,7 @@ message("BuildMode = ${BUILD_MODE}")
 
 if(BUILD_MODE STREQUAL "Debug")
   set(LIBDIR ${CMAKE_CURRENT_BINARY_DIR}/Debug)
-else(BUILD_MODE STREQUAL "Debug")
+else()
   set(LIBDIR ${CMAKE_CURRENT_BINARY_DIR}/Release)
 endif()
 

build_files/cmake/packaging.cmake

@@ -48,7 +48,7 @@ if(MSVC)
   else()
     set(PACKAGE_ARCH windows32)
   endif()
-else(MSVC)
+else()
   set(PACKAGE_ARCH ${CMAKE_SYSTEM_PROCESSOR})
 endif()