Remove custom "save" functions from Javascript sketch

[haschdl]

Throughout the sketches both @haschdl and @regisfrias make extensive use of the save() and/or saveFrame() functions.
In HTML5, one can simply right-click on a canvas and choose "Save image".

dear-gen-code/helsinki/Week-07/sketch/sketch.js

Lines 105 to 122 in 0ef3a46

	if (saveFile) {
	const fileName =
	'saved-png/' +
	year() +
	'-' +
	month() +
	'-' +
	day() +
	'-' +
	hour() +
	'-' +
	minute() +
	'-' +
	second() +
	'-telhado.png';
	save(fileName);
	saveFile = false;
	}

I suggest we remove the "save" operations from sketches, unless it has a aesthetic reason. This would improve legibility of the code and reduce lines of code considerably.