How to remove extra space at the bottom of tables and figures?

Question

As shown below, tables and figures seem to add extra space at the bottom:

In the example below the problem persist also using float (\intextsep was multiplied by 1.5 \baselineskip for better readability):

Code for the first image:

\documentclass[a4paper,12pt]{article}
\usepackage[demo]{graphicx}

\begin{document}

\noindent AAAAAAAAAAAAAAAAAAAAAAAA

\begin{table}[h]
 \begin{tabular}{c} 
  \hline
  table \\
  \hline
 \end{tabular}
\end{table}

\noindent BBBBBBBBBBBBBBBBBBBBBBBB

\begin{table}[h]
 \vspace*{-\baselineskip}
 \begin{tabular}{c} 
  \hline
  table \\
  \hline
 \end{tabular}
 \vspace*{-\baselineskip}
\end{table}

\noindent CCCCCCCCCCCCCCCCCCCCCCCC

\begin{figure}[ht]
 \includegraphics{demo}
\end{figure}

\noindent DDDDDDDDDDDDDDDDDDDDDDDD

\begin{figure}[!ht]
 \vspace*{-\baselineskip}
 \includegraphics{demo}
 \vspace*{-\baselineskip}
\end{figure}

\noindent EEEEEEEEEEEEEEEEEEEEEEEE

\end{document}

Answer 1

If you set the space around here floats to 0pt and remove the negative spacing added in the example you get

\documentclass[a4paper,12pt]{article}
\usepackage[demo]{graphicx}

\setlength\intextsep{0pt}
\setlength\lineskip{0pt}

\showoutput
\begin{document}

\noindent AA

\begin{table}[h]
 \begin{tabular}{c} 
  \hline
  table \\
  \hline
 \end{tabular}
\end{table}

\noindent BB

\begin{table}[h]
 \begin{tabular}{c} 
  \hline
  table \\
  \hline
 \end{tabular}
\end{table}

\noindent CC

\begin{figure}[ht]
 \includegraphics{demo}
\end{figure}

\noindent DD

\begin{figure}[!ht]
 \includegraphics{demo}
\end{figure}

\noindent EE

\end{document}

looking in the log you see the vertical space after the first table before BB is

...\penalty 0
...\glue 0.0
...\glue 0.0 plus -1.0
...\penalty 10000
...\glue(\parskip) 0.0 plus 1.0
...\glue(\baselineskip) 6.3

so standard baselineskip spacing as between lines of a paragraph, similarly before CC

....\glue 0.0
...\penalty 0
...\glue 0.0
...\glue 0.0 plus -1.0
...\penalty 10000
...\glue(\parskip) 0.0 plus 1.0
...\glue(\baselineskip) 6.3

DD and EE are the same.