Re-enable linear-elasticity by removing Amiramesh components

This makes the program compile again, but it will not run. Further changes in the data readers has to be made.

src/CMakeLists.txt

 # Note: PYTHONLIBS_FOUND is only for backwards compatibility with dune-fufem 2.7 and can be removed
 #       in the next release
 if(ADOLC_FOUND AND IPOPT_FOUND AND ( Python3_FOUND OR PYTHONLIBS_FOUND )  AND dune-uggrid_FOUND)
-  set(programs finite-strain-elasticity)
-              #linear-elasticity depends on Amiramesh which is dropped since DUNE 2.8
+  set(programs linear-elasticity
+               finite-strain-elasticity)
 
   foreach(_program ${programs})
     add_executable(${_program} ${_program}.cc)
@@ -13,13 +13,5 @@ if(ADOLC_FOUND AND IPOPT_FOUND AND ( Python3_FOUND OR PYTHONLIBS_FOUND )  AND du
     add_dune_mpi_flags(${_program})
 #    target_compile_options(${_program} PRIVATE "-fpermissive")
   endforeach()
-
-  if (AMIRAMESH_FOUND)
-    add_dune_amiramesh_flags(linear-elasticity)
-  endif()
-
-  if (PSURFACE_FOUND)
-    add_dune_psurface_flags(linear-elasticity)
-  endif()
 endif()