[Merge][Cmake]: reverted patch 7330 and bocked r7000 from merging

Initial message of blocked patch was : Adjusted CMakeLists.txt according to added files.

[[Imported from SVN: r7357]]

dune/common/CMakeLists.txt

@@ -33,7 +33,6 @@ install(FILES
         deprecated.hh
         densematrix.hh
         densevector.hh
-	diagonalmatrix.hh
         documentation.hh
         dynmatrix.hh
         dynvector.hh

dune/common/test/CMakeLists.txt

@@ -6,7 +6,6 @@ set(TESTS
     bitsetvectortest
     check_fvector_size
     conversiontest
-    diagonalmatrixtest
     dynmatrixtest
     dynvectortest
     enumsettest
@@ -86,9 +85,6 @@ add_executable("dynmatrixtest" dynmatrixtest.cc)
 target_link_libraries("dynmatrixtest" "dunecommon")
 
 add_executable("dynvectortest" dynvectortest.cc)
-
-add_executable("diagonalmatrixtest" diagonalmatrixtest.cc)
-
 add_executable("enumsettest" enumsettest.cc)
 
 add_executable("fassigntest" fassigntest.cc)