config/Global: remove unused function config_get_block()

src/config/Global.cxx

@@ -82,12 +82,6 @@ config_get_param(ConfigOption option) noexcept
 	return config_data.GetParam(option);
 }
 
-const ConfigBlock *
-config_get_block(ConfigBlockOption option) noexcept
-{
-	return config_data.GetBlock(option);
-}
-
 const char *
 config_get_string(ConfigOption option, const char *default_value) noexcept
 {

src/config/Global.hxx

@@ -52,10 +52,6 @@ gcc_pure
 const ConfigParam *
 config_get_param(enum ConfigOption option) noexcept;
 
-gcc_pure
-const ConfigBlock *
-config_get_block(enum ConfigBlockOption option) noexcept;
-
 const char *
 config_get_string(enum ConfigOption option,
 		  const char *default_value=nullptr) noexcept;