Rm coalesce (#193)

* Remove deprecated Coalesce constant from environment flags.

* Remove deprecated comment for `Coalesce` as it is no longer relevant.

---------

Co-authored-by: JkLondon <ilya@mikheev.fun>

Author: JkLondon

mdbx/env.go

@@ -32,10 +32,8 @@ const (
 	EnvDefaults = C.MDBX_ENV_DEFAULTS
 	LifoReclaim = C.MDBX_LIFORECLAIM
 	// FixedMap    = C.MDBX_FIXEDMAP   // Danger zone. Map memory at a fixed address.
-	NoSubdir = C.MDBX_NOSUBDIR // Argument to Open is a file, not a directory.
-	Accede   = C.MDBX_ACCEDE
-	// Deprecated: always turned on since v0.12, deprecated since v0.13
-	Coalesce      = C.MDBX_COALESCE
+	NoSubdir      = C.MDBX_NOSUBDIR // Argument to Open is a file, not a directory.
+	Accede        = C.MDBX_ACCEDE
 	Readonly      = C.MDBX_RDONLY     // Used in several functions to denote an object as readonly.
 	WriteMap      = C.MDBX_WRITEMAP   // Use a writable memory map.
 	NoMetaSync    = C.MDBX_NOMETASYNC // Don't fsync metapage after commit.