remove identity examples -- update cmake for scope_example.cpp

Author: JeffGarland

examples/CMakeLists.txt

@@ -1,24 +1,10 @@
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-set(ALL_EXAMPLES identity_direct_usage)
-
-# Example `identity_as_default_projection` need ranges support:
-include(CheckCXXSymbolExists)
-check_cxx_symbol_exists(__cpp_lib_ranges "ranges" HAS_RANGES)
-
-if(HAS_RANGES)
-    list(APPEND ALL_EXAMPLES identity_as_default_projection)
-else()
-    message(
-        WARNING
-        "Missing range support! Skip: identity_as_default_projection"
-    )
-endif()
+set(ALL_EXAMPLES scope_example)
 
 message("Examples to be built: ${ALL_EXAMPLES}")
 
 foreach(example ${ALL_EXAMPLES})
     add_executable(beman.scope.examples.${example})
     target_sources(beman.scope.examples.${example} PRIVATE ${example}.cpp)
-    target_link_libraries(beman.scope.examples.${example} beman::scope)
 endforeach()