Remove all -Werror= flags.

Index: CompilerChecks.cmake
--- CompilerChecks.cmake.orig
+++ CompilerChecks.cmake
@@ -7,15 +7,7 @@ if (UNIX)
     #
     # This will prevent that compiler flags are detected incorrectly.
     #
-    check_c_compiler_flag("-Werror" REQUIRED_FLAGS_WERROR)
-    if (REQUIRED_FLAGS_WERROR)
-        set(CMAKE_REQUIRED_FLAGS "-Werror")
 
-        if (PICKY_DEVELOPER)
-            list(APPEND SUPPORTED_COMPILER_FLAGS "-Werror")
-        endif()
-    endif()
-
     add_c_compiler_flag("-std=gnu99" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wpedantic" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wall" SUPPORTED_COMPILER_FLAGS)
@@ -23,22 +15,13 @@ if (UNIX)
     add_c_compiler_flag("-Wmissing-prototypes" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wcast-align" SUPPORTED_COMPILER_FLAGS)
     #add_c_compiler_flag("-Wcast-qual" SUPPORTED_COMPILER_FLAGS)
-    add_c_compiler_flag("-Werror=address" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wstrict-prototypes" SUPPORTED_COMPILER_FLAGS)
-    add_c_compiler_flag("-Werror=strict-prototypes" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wwrite-strings" SUPPORTED_COMPILER_FLAGS)
-    add_c_compiler_flag("-Werror=write-strings" SUPPORTED_COMPILER_FLAGS)
-    add_c_compiler_flag("-Werror-implicit-function-declaration" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wpointer-arith" SUPPORTED_COMPILER_FLAGS)
-    add_c_compiler_flag("-Werror=pointer-arith" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wdeclaration-after-statement" SUPPORTED_COMPILER_FLAGS)
-    add_c_compiler_flag("-Werror=declaration-after-statement" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wreturn-type" SUPPORTED_COMPILER_FLAGS)
-    add_c_compiler_flag("-Werror=return-type" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wuninitialized" SUPPORTED_COMPILER_FLAGS)
-    add_c_compiler_flag("-Werror=uninitialized" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wimplicit-fallthrough" SUPPORTED_COMPILER_FLAGS)
-    add_c_compiler_flag("-Werror=strict-overflow" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wstrict-overflow=2" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wno-format-zero-length" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wmissing-field-initializers" SUPPORTED_COMPILER_FLAGS)
@@ -49,7 +32,6 @@ if (UNIX)
         set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Wformat")
     endif()
     add_c_compiler_flag("-Wformat-security" SUPPORTED_COMPILER_FLAGS)
-    add_c_compiler_flag("-Werror=format-security" SUPPORTED_COMPILER_FLAGS)
 
     # Allow zero for a variadic macro argument
     string(TOLOWER "${CMAKE_C_COMPILER_ID}" _C_COMPILER_ID)