msi: Remove invalid fixmes.

dlls/msi/source.c

@@ -1007,12 +1007,6 @@ UINT WINAPI MsiSourceListAddMediaDiskW(LPCWSTR szProduct, LPCWSTR szUserSid,
         FIXME("Unhandled options MSICODE_PATCH\n");
         return ERROR_FUNCTION_FAILED;
     }
-    
-    if (szUserSid)
-        FIXME("Unhandled UserSid %s\n",debugstr_w(szUserSid));
-
-    if (dwContext == MSIINSTALLCONTEXT_USERUNMANAGED)
-        FIXME("Unknown context MSIINSTALLCONTEXT_USERUNMANAGED\n");
 
     rc = OpenSourceKey(szProduct, &sourcekey, MSICODE_PRODUCT, dwContext, FALSE);
     if (rc != ERROR_SUCCESS)