Remove float specifiers from figures

letter.tex

@@ -351,7 +351,7 @@ the right direction.
 This would suggest that most frame errors occur due to only a few incorrectly
 decoded bits.%
 %
-\begin{figure}[ht]
+\begin{figure}
     \centering
 
     \begin{tikzpicture}
@@ -416,7 +416,7 @@ This behavior supports the conjecture that the reason for the high DFR is a
 failure to converge to the correct codeword in the final steps of the
 optimization process.%
 %
-\begin{figure}[h]
+\begin{figure}
     \centering
 
     \begin{tikzpicture}
@@ -526,7 +526,7 @@ leading to the aforementioned oscillation.
 Second, the gradient of the code constraint polynomial itself starts to
 oscillate after a certain number of iterations.%
 %
-\begin{figure}[ht]
+\begin{figure}
     \centering
 
     \begin{tikzpicture}
@@ -672,7 +672,7 @@ The parameters chosen for the simulation are
 $\gamma = 0.05, \omega=0.05, \eta=1.5, K=200$.
 Again, these parameters were chosen,%
 %
-\begin{figure}[ht]
+\begin{figure}
     \centering
 
     \begin{tikzpicture}