docs(common): remove incorrect constructor signature of HttpException

[kalmanbendeguz]

HttpException cannot be instantiated with zero arguments. The provided first example is misleading.

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe: Documentation correction

What is the current behavior?

There is a misleading example of the usage of HttpException's constructor. It cannot be instantiated with zero arguments.

Issue Number: N/A

What is the new behavior?

Removed incorrect example.

Does this PR introduce a breaking change?

• Yes
• No

Other information

[coveralls]

Pull Request Test Coverage Report for Build d103178f-0b6d-4886-8054-4751bb574b9f

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.16%

---

Totals
Change from base Build 3bdf7d9b-d77b-45e6-ae7c-043c1979ed39:	0.0%
Covered Lines:	6736
Relevant Lines:	7309

---

💛 - Coveralls

[kamilmysliwiec]

lgtm