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[Ada] Remove useless special handling for SPARK verification

The use of a specific light expansion for SPARK verification has rendered
obsolete a number of special handling cases only triggered in the normal
full expansion. Remove these useless cases now.

Tested on x86_64-pc-linux-gnu, committed on trunk

2013-10-17  Yannick Moy  <>

	* exp_ch3.adb (Expand_Freeze_Class_Wide_Type,
	Expand_Freeze_Class_Wide_Type, Expand_Freeze_Class_Wide_Type):
	Remove useless special cases.
	* exp_ch4.adb (Expand_Allocator_Expression, Expand_N_Allocator,
	Expand_N_Op_Expon): Remove useless special cases.
	* exp_ch6.adb (Is_Build_In_Place_Function_Call): Disable build-in-place
	in SPARK mode by testing Full_Expander_Active instead of
	(Make_Build_In_Place_Call_In_Allocator): Remove useless special case.
	* exp_util.adb (Build_Allocate_Deallocate_Proc): Remove
	useless special case.
	* sem_eval.adb (Compile_Time_Known_Value): Remove special handling of
	deferred constant.

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