Bogus methods in `binary_operations.jl`

[giordano]

Oceananigans.jl/src/AbstractOperations/binary_operations.jl

Lines 130 to 134 in 6fd02a4

	$op(Lc::Tuple, f::Function, b::AbstractField) = $op((Lc[1](), Lc[2](), Lc[3]()), a, b)
	$op(Lc::Tuple, a::AbstractField, f::Function) = $op((Lc[1](), Lc[2](), Lc[3]()), a, b)
	$op(Lc::Tuple, m::GridMetric, b::AbstractField) = $op((Lc[1](), Lc[2](), Lc[3]()), a, b)
	$op(Lc::Tuple, a::AbstractField, m::GridMetric) = $op((Lc[1](), Lc[2](), Lc[3]()), a, b)

All methods refer to a and b, but each of them takes only a or b as argument, so all methods try to access undefined variables. No clue of what this should be. Introduced by @simone-silvestri in #4870.

Detected with JETLS.