This cache was added in b6b4967aa, when there was no real Zoom support.
With 63f349319, a proper identification of multimedia stream has been
added, making this cache quite useless: any improvements on Zoom
classification should be properly done in Zoom dissector.
Tested for some months with a few 10Gbits links of residential traffic: the
cache pretty much never returned a valid hit.
The new values has been checked against the ones reported by Wireshark.
Found while fixing a Use-of-uninitialized-value error reported by
oss-fuzz
```
==7582==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x5a6549abc368 in ndpi_compute_ja4 ndpi/src/lib/protocols/tls.c:1762:10
#1 0x5a6549ab88a0 in processClientServerHello ndpi/src/lib/protocols/tls.c:2863:10
#2 0x5a6549ac1452 in processTLSBlock ndpi/src/lib/protocols/tls.c:909:5
#3 0x5a6549abf588 in ndpi_search_tls_tcp ndpi/src/lib/protocols/tls.c:1098:2
#4 0x5a65499c53ec in check_ndpi_detection_func ndpi/src/lib/ndpi_main.c:7215:6
```
See: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=68449&q=ndpi&can=1&sort=-id
