Remove useless cmake command

TESTS/CMakeLists.txt

-project(Phoenix)
-cmake_minimum_required(VERSION 2.8)
 
 add_definitions(-DCMAKE_SOURCE_DIR="${CMAKE_SOURCE_DIR}")
 

TESTS/TEST_DOT/CMakeLists.txt

-project(Phoenix)
 
 add_executable(test_graph_to_dot main.cpp)
 target_link_libraries(test_graph_to_dot phoenix_graph)

TESTS/TEST_DOT_LOOP/CMakeLists.txt

-project(Phoenix)
 
 add_executable(test_graph_to_dot_loop main.cpp)
 target_link_libraries(test_graph_to_dot_loop phoenix_graph)

TESTS/TEST_DOT_REMOVE/CMakeLists.txt

-project(Phoenix)
 
 add_executable(test_graph_to_dot_remove main.cpp)
 target_link_libraries(test_graph_to_dot_remove phoenix_graph)

TESTS/TEST_DOT_STR/CMakeLists.txt

-project(Phoenix)
 
 add_executable(test_graph_to_dot_str main.cpp)
 target_link_libraries(test_graph_to_dot_str phoenix_graph)

TESTS/TEST_DOT_TOTAL_LOOP/CMakeLists.txt

-project(Phoenix)
 
 add_executable(test_graph_to_dot_total_loop main.cpp)
 target_link_libraries(test_graph_to_dot_total_loop phoenix_graph)

TESTS/TEST_PNTREE_LIGHT/CMakeLists.txt

-project(Phoenix)
-cmake_minimum_required(VERSION 3.0)
 
 add_executable(test_pntreelight main.cpp)
 target_link_libraries(test_pntreelight phoenix_graph)

cmake/CMakeLists.txt

-project(Phoenix)
-cmake_minimum_required(VERSION 2.8)
 
 include(createLinuxPackages.cmake)
 include(phoenix_base_project.cmake)

doc/CMakeLists.txt

-project(Phoenix)
-cmake_minimum_required(VERSION 2.8)
 
 phoenix_create_doc(PhoenixGraph Doxyfile.cmake)
 

src/CMakeLists.txt

-project(Phoenix)
-cmake_minimum_required(VERSION 2.8)
 
 file(GLOB_RECURSE graph_sources "${CMAKE_CURRENT_SOURCE_DIR}/*.cpp")
 

src/Tree/CMakeLists.txt

-project(Phoenix)
-cmake_minimum_required(VERSION 2.8)
 
 file(GLOB headers "${CMAKE_CURRENT_SOURCE_DIR}/*.h")
 install(FILES ${headers} DESTINATION include/PhoenixGraph/Tree)