ref: remove some dead code

[armcknight]

I was looking at a couple places where we use a dynamic key to insert values into dictionaries as possible candidates for an exception to be thrown, and found a couple macros that expand to such code, but don't appear to be used in the codebase.

#skip-changelog

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1199.60 ms	1218.36 ms	18.76 ms
Size	20.76 KiB	431.91 KiB	411.15 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
d253cdf	1231.61 ms	1259.52 ms	27.91 ms
cbf6225	1221.73 ms	1251.20 ms	29.47 ms
7fb7afb	1235.00 ms	1256.81 ms	21.81 ms
20163bb	1248.92 ms	1258.48 ms	9.56 ms
78d5983	1229.98 ms	1245.60 ms	15.62 ms
1bbcb9c	1214.25 ms	1230.04 ms	15.79 ms
8f397a7	1251.82 ms	1268.34 ms	16.52 ms
725565a	1234.59 ms	1250.02 ms	15.43 ms
cce35c6	1228.88 ms	1241.14 ms	12.26 ms
a9103fe	1265.47 ms	1267.37 ms	1.90 ms

App size

Revision	Plain	With Sentry	Diff
d253cdf	20.76 KiB	427.66 KiB	406.90 KiB
cbf6225	20.76 KiB	425.77 KiB	405.00 KiB
7fb7afb	20.76 KiB	419.69 KiB	398.94 KiB
20163bb	20.76 KiB	426.82 KiB	406.06 KiB
78d5983	20.76 KiB	427.80 KiB	407.04 KiB
1bbcb9c	20.76 KiB	426.10 KiB	405.34 KiB
8f397a7	20.76 KiB	420.55 KiB	399.79 KiB
725565a	20.76 KiB	426.11 KiB	405.35 KiB
cce35c6	20.76 KiB	425.80 KiB	405.04 KiB
a9103fe	20.76 KiB	426.95 KiB	406.19 KiB

Previous results on branch: armcknight/ref/remove-dead-code

Startup times

Revision	Plain	With Sentry	Diff
e0da0d6	1218.63 ms	1230.12 ms	11.49 ms

App size

Revision	Plain	With Sentry	Diff
e0da0d6	20.76 KiB	431.91 KiB	411.15 KiB

[armcknight]

tests should pass after merging #2867

[philipphofmann]

LGTM, it's always great to see dead code deleted 😀.