Simplify code since cmake minimum version is now 3.5

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit 3fef288384)

CMakeLists.txt

@@ -57,14 +57,8 @@ list( APPEND TDECORE_LIBRARY_DIRS ${TQT_LIBRARY_DIRS} )
 
 ##### add apidox targets ############
 
-if( "${CMAKE_VERSION}" VERSION_LESS "3.1" )
-  set( CMAKE_ENV "env" )
-else()
-  set( CMAKE_ENV "${CMAKE_COMMAND};-E;env" )
-endif()
-
 add_custom_target( apidox
-  COMMAND ${CMAKE_ENV}
+  COMMAND ${CMAKE_COMMAND} -E env
     "TQTDOCDIR=/usr/share/tqt3/doc/html"
     ${CMAKE_SOURCE_DIR}/admin/doxygen.sh
     --no-modulename

tdeabc/vcardparser/CMakeLists.txt

@@ -73,12 +73,6 @@ tde_add_check_executable( testread2
   LINK ${TDEABC_TESTS_LINK}
 )
 
-if( CMAKE_VERSION VERSION_LESS "2.8.4" )
-  if( NOT EXISTS "${CMAKE_CURRENT_BINARY_DIR}/tests" )
-    execute_process( COMMAND ln -s "${CMAKE_CURRENT_SOURCE_DIR}/tests" "${CMAKE_CURRENT_BINARY_DIR}/tests" )
-  endif( )
-endif()
-
 add_test( NAME tdeabc/vcardparser/testread2 COMMAND testread2 WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}" )
 
 # testread tests