rev: delete sqlite copy constructor/assignment

Copy constructor/assignment operator are not used for the `sqlite`
class, and should subsequently be deleted. This change is implemented
per NOAA-OWP#522 (comment).

include/geopackage/NGen_SQLite.hpp

@@ -170,8 +170,9 @@ class sqlite
      */
     sqlite(const std::string& path);
 
-    sqlite(sqlite& db);
-    sqlite& operator=(sqlite& db);
+    sqlite(sqlite& db) = delete;
+
+    sqlite& operator=(sqlite& db) = delete;
 
     /**
      * Take ownership of a sqlite3 database

src/geopackage/sqlite/database.cpp

@@ -36,19 +36,6 @@ sqlite::sqlite(const std::string& path)
     this->conn = sqlite_t(conn);
 }
 
-sqlite::sqlite(sqlite& db)
-{
-    this->conn = std::move(db.conn);
-    this->stmt = db.stmt;
-}
-
-sqlite& sqlite::operator=(sqlite& db)
-{
-    this->conn = std::move(db.conn);
-    this->stmt = db.stmt;
-    return *this;
-}
-
 sqlite::sqlite(sqlite&& db)
 {
     this->conn = std::move(db.conn);