Removed internal_slots from object

[HalidOdat]

It changes the following:

• Removed internal slots

[codecov]

Codecov Report

Merging #601 into master will increase coverage by 0.11%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #601      +/-   ##
==========================================
+ Coverage   71.23%   71.34%   +0.11%     
==========================================
  Files         177      177              
  Lines       11588    11563      -25     
==========================================
- Hits         8255     8250       -5     
+ Misses       3333     3313      -20     

Impacted Files	Coverage Δ
boa/src/builtins/function/mod.rs	70.48% <ø> (-0.18%)	⬇️
boa/src/builtins/object/internal_methods.rs	29.51% <0.00%> (-0.66%)	⬇️
boa/src/builtins/object/mod.rs	39.17% <ø> (+0.84%)	⬆️
boa/src/builtins/value/mod.rs	65.92% <ø> (+2.58%)	⬆️

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[github-actions]

Benchmark for 060e9ae

Click to view benchmark

Test	PR Benchmark	Master Benchmark	%
Arithmetic operations (Execution)	377.5±6.06ns	373.0±6.03ns	+1.21%
Arithmetic operations (Full)	163.2±2.99µs	173.9±3.69µs	-6.15%
Array access (Execution)	8.2±0.34µs	8.4±0.24µs	-2.38%
Array access (Full)	178.7±5.11µs	187.6±5.10µs	-4.74%
Array creation (Execution)	3.5±0.09ms	3.3±0.05ms	+6.06%
Array creation (Full)	3.6±0.05ms	3.6±0.07ms	0.00%
Array pop (Execution)	1266.1±47.17µs	1183.2±36.76µs	+7.01%
Array pop (Full)	1508.3±36.72µs	1499.0±27.13µs	+0.62%
Boolean Object Access (Execution)	4.3±0.13µs	4.5±0.10µs	-4.44%
Boolean Object Access (Full)	174.2±3.61µs	182.3±4.38µs	-4.44%
Create Realm	435.6±8.46ns	473.1±7.13ns	-7.93%
Dynamic Object Property Access (Execution)	4.8±0.34µs	5.3±0.14µs	-9.43%
Dynamic Object Property Access (Full)	172.6±3.08µs	183.8±5.64µs	-6.09%
Expression (Lexer)	2.4±0.07µs	2.4±0.06µs	0.00%
Expression (Parser)	5.5±0.11µs	5.5±0.06µs	0.00%
Fibonacci (Execution)	877.9±17.67µs	948.3±17.06µs	-7.42%
Fibonacci (Full)	1062.1±38.98µs	1157.0±52.30µs	-8.20%
For loop (Execution)	21.7±0.43µs	21.8±0.62µs	-0.46%
For loop (Full)	195.4±14.55µs	200.5±4.94µs	-2.54%
For loop (Lexer)	5.3±0.09µs	5.3±0.17µs	0.00%
For loop (Parser)	13.7±0.30µs	14.3±0.36µs	-4.20%
Goal Symbols (Parser)	8.3±0.33µs	8.8±1.01µs	-5.68%
Hello World (Lexer)	821.6±16.15ns	835.8±18.65ns	-1.70%
Hello World (Parser)	2.2±0.04µs	2.2±0.10µs	0.00%
Long file (Parser)	6.1±0.12ms	6.4±0.07ms	-4.69%
Number Object Access (Execution)	3.3±0.16µs	3.5±0.06µs	-5.71%
Number Object Access (Full)	169.9±2.46µs	181.2±6.57µs	-6.24%
Object Creation (Execution)	4.1±0.33µs	4.4±0.09µs	-6.82%
Object Creation (Full)	195.1±3.86µs	201.8±4.76µs	-3.32%
RegExp (Execution)	69.1±3.26µs	69.5±1.81µs	-0.58%
RegExp (Full)	278.8±6.32µs	289.1±8.29µs	-3.56%
RegExp Literal (Execution)	68.2±1.70µs	69.0±3.82µs	-1.16%
RegExp Literal (Full)	250.2±5.92µs	260.2±6.22µs	-3.84%
RegExp Literal Creation (Execution)	64.2±1.81µs	65.9±2.07µs	-2.58%
RegExp Literal Creation (Full)	279.3±7.02µs	285.8±6.93µs	-2.27%
Static Object Property Access (Execution)	4.3±0.24µs	4.7±0.10µs	-8.51%
Static Object Property Access (Full)	171.7±2.60µs	180.2±4.33µs	-4.72%
String Object Access (Execution)	6.3±0.19µs	6.8±0.15µs	-7.35%
String Object Access (Full)	175.7±5.46µs	185.2±2.77µs	-5.13%
String comparison (Execution)	5.8±0.12µs	6.0±0.26µs	-3.33%
String comparison (Full)	176.7±6.34µs	183.4±3.20µs	-3.65%
String concatenation (Execution)	4.7±0.11µs	4.9±0.07µs	-4.08%
String concatenation (Full)	171.2±5.38µs	177.6±2.93µs	-3.60%
String copy (Execution)	3.4±0.09µs	3.7±0.38µs	-8.11%
String copy (Full)	165.5±7.74µs	176.1±3.71µs	-6.02%
Symbols (Execution)	2.8±0.05µs	3.1±0.06µs	-9.68%
Symbols (Full)	162.1±5.30µs	167.8±2.87µs	-3.40%