[Bug]: Treatment of X509_CERT_DIR in BundleDeliveryClient #8501

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Bug Description

The code currently in BundleDeliveryClient unsets X509_CERT_DIR just to define it immediately again.

This seems to be an error or at least an incomplete cleanup in this commit:
dbd11ff#diff-4b559d033eb04c28a1bb49dc75edf5fe8f2ac4ed7ffbcc5bfe8269b8389170d0L152

In the original commit, the variable was unset, then the CAs were synced, then the variable was set again:
b148701

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Expected Behavior

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Actual Behavior

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