configure: Remove some unnecessary exported config items

The only need to be listed if they are to be used in ifdefs from
within the code - config items used as dependencies only within
configure don't need to be exported.

Signed-off-by: Martin Storsjö <martin@martin.st>

configure

@@ -1529,8 +1529,6 @@ TOOLCHAIN_FEATURES="
 
 TYPES_LIST="
     CONDITION_VARIABLE_Ptr
-    DXVA_PicParams_HEVC
-    ID3D11VideoDecoder
     socklen_t
     struct_addrinfo
     struct_group_source_req