Following up on r1807584, remove unnecessary SQL statements fromthe WC schema definition and simplify a step in the upgrade process.* subversion/libsvn_wc/wc-metadata.sql (STMT_CREATE_NODES): Remove and include into STMT_CREATE_SCHEMA. (STMT_CREATE_NODES_TRIGGERS): Likewise. (STMT_CREATE_EXTERNALS): Likewise. (STMT_UPGRADE_TO_31_ALTER_TABLE, STMT_UPGRADE_TO_31_FINALIZE): Combine these statements into a single ... (STMT_UPGRADE_TO_31): ... which is new. (STMT_UPGRADE_TO_32): Remove as unused. (-- format: YYY): Remove as unused, it converted to a comment anyway.* subversion/libsvn_wc/wc_db.c (init_db): Remove use of deleted SQL statements.* subversion/libsvn_wc/upgrade.c (bump_to_31): Remove the manual check for the existence of the NODES.inherited_props column since we no longer support the unreleased formats prior to format 20 that did not have a NODES table.* subversion/tests/libsvn_wc/utils.c (svn_test__create_fake_wc): Remove use of deleted SQL statements.* subversion/tests/libsvn_wc/wc-queries-test.c (schema_statements): Remove use of deleted SQL statements.