Remove aliases in time.ts

[axmmisaka]

In time.ts we have time units and their aliases.

This is the main reason why #227 is failing linting because of a newly introduced linting rule.

In the code generator, the canonical name of time units are all singular. Plural forms are all aliases and (I believe) won't be included in the generated code.

We should remove the aliases to make eslint happy and to improve code quality.

reactor-ts/src/core/time.ts

Lines 11 to 25 in b81e1ce

	export enum TimeUnit {
	nsec = 1,
	usec = 1000,
	msec = 1000000,
	sec = 1000000000,
	secs = 1000000000,
	minute = 60000000000,
	minutes = 60000000000,
	hour = 3600000000000,
	hours = 3600000000000,
	day = 86400000000000,
	days = 86400000000000,
	week = 604800000000000,
	weeks = 604800000000000
	}

https://github.com/lf-lang/lingua-franca/blob/4dbd9f822d1c769f37de179d00deb87aeff5f6d4/core/src/main/java/org/lflang/TimeUnit.java#L40-L58

[lhstrh]

👍