fix: Don't include SRS in sandbox docker img (#1704)

Please provide a paragraph or two giving a summary of the change,
including relevant motivation and context.

Fixes #1659 

# Checklist:
Remove the checklist to signal you've completed it. Enable auto-merge if
the PR is ready to merge.
- [ ] If the pull request requires a cryptography review (e.g.
cryptographic algorithm implementations) I have added the 'crypto' tag.
- [ ] I have reviewed my diff in github, line by line and removed
unexpected formatting changes, testing logs, or commented-out code.
- [ ] Every change is related to the PR description.
- [ ] I have
[linked](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue)
this pull request to relevant issues (if any exist).

yarn-project/aztec-sandbox/Dockerfile

@@ -1,5 +1,6 @@
 FROM 278380418400.dkr.ecr.eu-west-2.amazonaws.com/yarn-project-base AS builder
 
+RUN rm -rf /usr/src/circuits/cpp/barretenberg/cpp/srs_db/ignition/monomial
 COPY . .
 
 WORKDIR /usr/src/yarn-project/aztec-sandbox