sPFFramework/src/main/java/it/polimi/spf/framework/profile/ProfileTable.java
boolean removePersona(SPFPersona persona) {
		SQLiteDatabase db = getWritableDatabase();
		if (persona.getIdentifier().equals("default")) {
			return false;
		}

		String table = Contract.TABLE_PERSONAS;
		String selection = Contract.COLUMN_PERSONA + " = ?";
		String[] selectionArgs = { persona.getIdentifier() };
		if (db.delete(table, selection, selectionArgs) > 0) {
			deleteFieldsOf(persona, db);
			deleteVisibilityOf(persona, db);
		}
		return true;
	}
boolean removePersona(SPFPersona persona) {
		SQLiteDatabase db = getWritableDatabase();
		if (persona.getIdentifier().equals("default")) {
			return false;
		}

		String table = Contract.TABLE_PERSONAS;
		String selection = Contract.COLUMN_PERSONA + " = ?";
		String[] selectionArgs = { persona.getIdentifier() };
		if (db.delete(table, selection, selectionArgs) > 0) {
			deleteFieldsOf(persona, db);
			deleteVisibilityOf(persona, db);
		}
		return true;
	}
Delete a SPFPersona. All the information related to the specified persona
will be erased.

@param persona
- the {@link SPFPersona} to remove