Of course the circuit uses an inductor (you show it as a 2k resistor) because it still lights the 3.3V LED when the battery voltage has dropped to 0.9V. The inductor looks like a resistor.
My solar garden lights that use an ordinary LED do not use a capacitor parallel with the LED. The solar garden lights that use a color changing LED use a parallel capacitor because the colors are changed by a tiny IC inside the LED and the IC needs its power supply to be filtered.
Look in Google Images for Solar Garden Light Circuit.
Here is your circuit but it uses discrete parts instead of the black blob: