docs(readme): remove useless tips for node runtime environment

[halibobo1205]

What does this PR do?

remove useless tips for node runtime environment

Why are these changes required?

This PR has been tested by:

• Unit Tests
• Manual Testing

Follow up

Extra details

[codecov-commenter]

Codecov Report

Merging #4826 (f172156) into develop (8f78620) will increase coverage by 0.04%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop    #4826      +/-   ##
=============================================
+ Coverage      54.28%   54.33%   +0.04%     
- Complexity      8089     8094       +5     
=============================================
  Files            838      838              
  Lines          47888    47888              
  Branches        5188     5188              
=============================================
+ Hits           25998    26019      +21     
+ Misses         19826    19806      -20     
+ Partials        2064     2063       -1     

Impacted Files	Coverage Δ
.../java/org/tron/common/overlay/server/SyncPool.java	67.83% <0.00%> (-0.70%)	⬇️
...java/org/tron/core/capsule/TransactionCapsule.java	51.66% <0.00%> (+0.23%)	⬆️
...mework/src/main/java/org/tron/core/db/Manager.java	54.79% <0.00%> (+0.92%)	⬆️
...ava/org/tron/common/overlay/server/PeerServer.java	90.90% <0.00%> (+6.06%)	⬆️
...src/main/java/org/tron/core/db/PendingManager.java	51.16% <0.00%> (+16.27%)	⬆️

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[Hitsaa]

is this requirement not required ?

[halibobo1205]

is this requirement not required ?

It's here hardware-requirements.