Bug fix: remove `shpc_create` from use list

Remove `shpc_create` from use list in main program `test_overlap`. It
is no longer needed since commit 50d2f596.

Overlap/Tests/CMakeLists.txt

@@ -7,7 +7,6 @@ add_executable(test_overlap
   ${PROJECT_SOURCE_DIR}/Common/read_eddy.f90
   ${PROJECT_SOURCE_DIR}/Common/read_field_indices.f90
   candidate_overlap.f90 ${PROJECT_SOURCE_DIR}/Common/write_eddy.f90
-  ${PROJECT_SOURCE_DIR}/Common/shpc_create.f90
   ${CMAKE_CURRENT_LIST_DIR}/test_overlap.f90
   ${PROJECT_SOURCE_DIR}/Common/shpc_open.f90
   ${PROJECT_SOURCE_DIR}/Common/shpc_close.f90 unit_edge_m.f90)

Overlap/Tests/test_overlap.f90

@@ -13,7 +13,6 @@ program test_overlap
   use overlap_m, only: overlap
   use read_snapshot_m, only: read_snapshot
   use shpc_close_m, only: shpc_close
-  use shpc_create_m, only: shpc_create
   use shpc_open_m, only: shpc_open
   use unit_edge_m, only: open_edge_file, unit_edge