Remove hpp files from CMake config as source files

Every documentation I have found of CMake only put .cpp files in this
place. They might have been added for some kind of dependency management
reason, but cmake doesn't even do that, that's done by "make". So I
believe they are not necessary and only clutter up the config.

Author: joto

src/CMakeLists.txt

@@ -1,7 +1,7 @@
 
 set(osm2pgsql_lib_SOURCES
-  dependency-manager.cpp
   db-copy.cpp
+  dependency-manager.cpp
   expire-tiles.cpp
   gazetteer-style.cpp
   geometry-processor.cpp
@@ -32,42 +32,6 @@ set(osm2pgsql_lib_SOURCES
   tagtransform.cpp
   util.cpp
   wildcmp.cpp
-  dependency-manager.hpp
-  db-copy.hpp
-  expire-tiles.hpp
-  gazetteer-style.hpp
-  geometry-processor.hpp
-  id-tracker.hpp
-  input-handler.hpp
-  middle-pgsql.hpp
-  middle-ram.hpp
-  middle.hpp
-  node-persistent-cache.hpp
-  node-ram-cache.hpp
-  options.hpp
-  osmdata.hpp
-  osmium-builder.hpp
-  osmtypes.hpp
-  output-gazetteer.hpp
-  output-multi.hpp
-  output-null.hpp
-  output-pgsql.hpp
-  output.hpp
-  pgsql.hpp
-  processor-line.hpp
-  processor-point.hpp
-  processor-polygon.hpp
-  progress-display.hpp
-  reprojection.hpp
-  sprompt.hpp
-  table.hpp
-  taginfo-impl.hpp
-  taginfo.hpp
-  tagtransform.hpp
-  thread-pool.hpp
-  util.hpp
-  wildcmp.hpp
-  wkb.hpp
 )
 
 if (LUA_FOUND OR LUAJIT_FOUND)