Remove capnp and libz for XDC parser PR.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>

fpga_interchange/family.cmake

@@ -1,4 +1,3 @@
-
 find_package(TCL)
 if(NOT ${TCL_FOUND})
     message(FATAL_ERROR "Tcl is required for FPGA interchange Arch.")
@@ -7,7 +6,4 @@ endif()
 foreach (target ${family_targets})
     target_link_libraries(${target} LINK_PUBLIC ${TCL_LIBRARY})
     include_directories (${TCL_INCLUDE_PATH})
-    target_link_libraries(${target} LINK_PUBLIC capnp)
-    target_link_libraries(${target} LINK_PUBLIC kj)
-    target_link_libraries(${target} LINK_PUBLIC z)
 endforeach()