libs2/tf: SWPROT-8720: removed unity_print as it's useless on x86 (SiliconLabsSoftware#57)

removed unity_print as it's useless on x86 and unit tests only run
on x86 nowadays

(cherry picked from commit cc1e9bd53e9abeab1702212a33182192663cad81)
Forwarded: SiliconLabsSoftware#57
Relate-to: SiliconLabsSoftware#50
Signed-off-by: Philippe Coval <philippe.coval@silabs.com>

Author: Luisky

applications/zpc/components/zwave/zwave_transports/s2/libs/zw-libs2/TestFramework/unity/CMakeLists.txt

@@ -1,16 +1,10 @@
-
-CROSS_SYSTEM_DIR("." "" CROSS_SYSTEM_DIR)
-
-SET(SOURCES
-  unity.c
-  ${CROSS_SYSTEM_DIR}/unity_print.c
-)
+SET(SOURCES unity.c)
 
 # unity target may be imported be several projects, e.g. 700 series and libs2 simultaneously.
 # This test ensures that the target named 'unity' will only be declared if it is not already declared.
 if (NOT TARGET unity)
   add_library(unity ${SOURCES} )
-  target_compile_definitions(unity PUBLIC "-DUNITY_EXCLUDE_FLOAT -DUNITY_OUTPUT_CHAR=ZW_putchar")
+  target_compile_definitions(unity PUBLIC "-DUNITY_EXCLUDE_FLOAT")
   target_include_directories(unity PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}")
 endif (NOT TARGET unity)